Nut-lock.



' J. J. HERZOG.

NUTIOOK. APPLICATION FILED AUG.8,-1911.

WITNESSES W1 WM W Patented Feb. 6, 1912.

. INVENTOR osz'pfl 1/ 6277204 ATTORNEYS UNITED STATES r trnn'r OFFICE.

.iosnrx .1. HERZOG, or nan'rmonn, MARYLAND.

Patented Feb. 6, 1912.

Application filed August 8, 1911. Serial No. 842,880.

invented an Improvement in Nut'Locks, of v I which the following is .a full, clear, and

exact description.

My invention is an improvement in that class of nut-locks in which a soft metal washer or bushing is used with a nut proper, the two being made and sold as separate articles and applied separately to abolt. In my invention, t h'nutand the soft metal washer are so constructed and' connected as to form a single article of manufacture adapted to be sold and used as such.

The details of arrangement, construction, andoperation of parts are "as hereinafer described, and illustrated in the accompanying drawing, in which,

Figure l is a sectional view' showing a nut applied to a screw-bolt and provided with a bushing of soft metal as it appears before compression; Fig. 2.- is ,a similar view, save that the nut is screwed home and the bush-;

ing compressed and expanded as required I for locking or sealing the nut; Fig. 3 is an inverted plan view of the nut; Fig. 4 is a side view of the nut; Fig. 5 is a cross section of the nut on the line 5--5 of Fig. 3; Fig. 6 is a perspective view ofthe soft metal bushing or washer.

As shown, the hat 1 is constructed. with a circular cavity ODI'BCQSS in its base, or inner face, for reception of a bushing or washer 2 made of copper, lead or-other soft metal or alloys. The bushing (see Fig. (l) is annular in form corresponding to the cavity surrounding the screw-bolt 3' and its upper side is also beveled or. inclined from the top downward, and the cavity of the nut is similarly constructed with a beveled shoulder for contact with such portion of the bushing. The thickness of the bushing issuch that it projects beyond' the base'o'f the nut, as indicated in Fig. 1. In order to secure the bushing firmly in the cavity of the nut so thatthey are practically inseparable, the base edge of the nut is indented in one or more places, as indicated at 4, whereby interior projecting claws or lugs are formed which project into and engage the bushing. .Thus- NUT-LOCK.

1,016,746. Specldoatlon of Letters Patent.-

To all it mag concern:

the bushing is firmly secured in the nut and the two form a practically integral article of sale and use. In Fig. 1 the nut with a bushing secured therein is shown applied to a bolt, the inner face of the bushin r resting in contact with the bar or p ate 5 through which the bolt passes. Upon screwing the nut down, as shown in Fig. 2, the bushin 2 is I compressed and thereby exande inward so as to fill the thread of the olt. Inother words, the bushin is compressed and s read between the be t and the adjacent wal of the cavity therein, so that the soft metal conforms to all the little irregularities of the thread and thus constitutes an effective metal seal, binding or locking the nut very firmly {t0 the bolt. The nut, which is thus slightly expanded by the compressive action stated, will naturally exert a resilient pressure on. the bushing and thereby neutralize vibrations due to any exterior cause. I thus provide a simple, effective, but inexpensive nut-lock which permits the nut to be easily screwed onto a bolt, and then secures it firmly in position. Since the bushing or washer-is compressed and flattened by use, it is obvious that the nut provided with it cannot be used a ain unless a supplemental bushing or was er of soft metal shall be applied. The same would be constructed in annular form but of less thickness than the original bushing, and in practice it would be placed on the bolt under and in contact with the flattened bushing so that it would serve to replace the ortion of the latter which has been presse into the cavity of the nut in the first application. What I claim is z- A nut locking device comprisin nut proper formed with a cavity in its inner face and a bushing or washer made of soft material and secured in said cavity and projecting therefrom beyond the base of the nut, the bore of the bushing having a greater dinmcter than the bore of the nut and-the latter having indented side portions, whereby the two parts are secured together and form practically one device adapted for use as suc 1.

' JOSEPH J. HERZOG. Witnesses J. B. IIARRISON,

H. K Ginus.

a bolt I 

